Alert archive / Illinois / Special Weather Statements in 2013
Special Weather Statement, NWS Lincoln, IL
NWS Lincoln, IL issued this special weather statement at Sep 8, 2013, 1:38 AM CDT for Knox County, Illinois. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 8, 2013, 1:38 AM CDT (06:38 UTC)
- Expired
- Sep 8, 2013, 2:45 AM CDT
- In force
- 67 min
- Issued by
- NWS Lincoln, IL
County Knox County, IL
The radar
The Quad Cities radar (KDVN), 96 km from the middle of the area, began a volume at 06:41 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 6.6 hours before the alert went out and 94 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1403 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 1657 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 324 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Lincoln, IL wrote its last area forecast discussion before this special weather statement went out at Sep 7, 11:05 PM CDT, 2 hours 33 minutes earlier.
Area forecast discussion, Sep 7, 11:05 PM CDT, 2 hours 33 minutes before
Area Forecast Discussion National Weather Service Lincoln IL 1105 PM CDT Sat Sep 7 2013 .DISCUSSION... ISSUED 835 PM CDT Sat Sep 7 2013 Weak cool front was located from extreme southern Wisconsin southwest through south central Iowa early this evening. Several waves of low pressure were noted on the boundary, which is effectively slowing the southward push to the front. Convection has had a tough time developing thanks to dry air at the low levels and a rather impressive cap that has been in place from this afternoon through early this evening. 00z ILX sounding showing sfc base cin of -293 j/kg with some weak elevated instability noted, but that is with a parcel being lifted at 650 mb and above! Not seeing any significant lift on satellite other than the weak impulses drifting southeast into our area about every two to three hours. Impressive accas field over our area and to our west and northwest over Iowa but nothing has been able to get organized. Will make some downward adjustments to our precip chances but still keep our evening scattered wording going. Later tonight as the front approaches, will continue to keep low chance pops going. Update should be out around 900 pm. && .AVIATION... ISSUED 1100 PM CDT Sat Sep 7 2013 Latest surface analysis indicating a weak cool front edging slowly south from just north of ORD west-southwest thru southeast Iowa. Widely scattered showers were occurring along the boundary and that will be the main forecast concern overnight along with the potential for some brief mvfr cigs immediately behind the cool front by dawn Sunday, affecting mainly PIA and BMI. Rather low confidence on placement of any showers tracking east southeast into our area overnight so VCTS or VCSH should cover it as even if we do get a shower to pass over a TAF site, cigs will remain VFR as it looks now. Forecast soundings do try to bring some mvfr cigs south to north central IL by morning which may affect PIA and BMI for a time in the 12z-16z time frame. Will continue with previous trends in keeping a lower scattered group for now and see how the lower cigs progress south overnight. Forecast soundings also indicating the potential for some sct-bkn cumulus to develop by late morning or early afternoon just behind the frontal boundary...which by early afternoon should be south of the TAF sites. Surface winds tonight will be light from a southeast to south direction, and then as the front pushes thru the area, winds will shift into an easterly direction at 7 to 12 kts on Sunday. Smith && .PREV DISCUSSION... ISSUED 300 PM CDT Sat Sep 7 2013 SHORT TERM...Today through Tuesday SPC added a slight risk of severe storms this evening from Lincoln northward where 15% risk of large hail and damaging wind gusts as cold front over central parts of WI & IA presses se into nw IL. Increase pops to 30-50% across northern areas tonight due to this. Vertical wind shear is 30-35 kts and have MLCAPES of 1500-2500 j/kg and helping support a small MCS over southern Lake Michigan. Some develop of thunderstorms possible further sw across northern IL and IL river valley by sunset and then progressing se over central IL during tonight. Some patchy fog possible over area overnight and if clouds are slower to move into southeast IL, fog could become more widespread near the Wabash River overnight. Lows in the mid to upper 60s. Frontal boundary to be near central IL Sunday and continue a chance of showers and thunderstorms. Still quite warm with highs in the upper 80s to near 90F and humid dewpoints in the upper 60s. SPC keeps the slight risk of severe storms for day2 over the northern plains. Even hotter conditions expected Monday and Tuesday with highs 90 to 95F Monday and in the 90s Tuesday with western areas in the upper 90s as 590 dm 500 mb high pushes east into the mid ms valley. LONG TERM...Tuesday night through Saturday Models continue showing a cold front settling southward over IL Wednesday night and will continue a chance of showers and thunderstorms ahead of it Wednesday and along it Wednesday night. Still very warm and humid Wed with highs in the upper 80s and lower 90s. Drier and cooler conditions expected behind the front late in the work week with highs in the low to mid 80s Thu and 75 to 80F on Friday. Lingered just a slight chance of convection Thu south of I-72. 07 && .ILX WATCHES/WARNINGS/ADVISORIES... NONE. &&
Hazardous weather outlook, Sep 7, 3:11 PM CDT, 10 hours 27 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LINCOLN IL 311 PM CDT SAT SEP 7 2013 ILZ027>031-036>038-041>043-081100- DE WITT-FULTON-KNOX-LOGAN-MARSHALL-MASON-MCLEAN-PEORIA-STARK- TAZEWELL-WOODFORD- 311 PM CDT SAT SEP 7 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS. .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS TONIGHT AS A COLD FRONT DROPS SOUTH INTO THE AREA. THERE IS A SLIGHT CHANCE FOR THE THUNDERSTORMS TO PRODUCE DAMAGING WINDS AND SLIGHT HAIL SHOULD STORMS DEVELOP LATER THIS AFTERNOON AND INTO THIS EVENING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THUNDERSTORM CHANCES WILL LINGER ON SUNDAY AS THE COLD FRONT SLOWLY PROGRESSES TOWARD SOUTHERN IL. ADDITIONAL CHANCES OF STORMS WILL COME NEXT WEDNESDAY AND WEDNESDAY NIGHT AS THE NEXT COLD FRONT MOVES ACROSS THE AREA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY LATER THIS EVENING AFTER 6PM SHOULD STORMS DEVELOP. ILZ040-044>057-061>063-081100- CASS-CHAMPAIGN-CHRISTIAN-CLARK-COLES-CUMBERLAND-DOUGLAS-EDGAR- MACON-MENARD-MORGAN-MOULTRIE-PIATT-SANGAMON-SCHUYLER-SCOTT-SHELBY- VERMILION- 311 PM CDT SAT SEP 7 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS AND EAST CENTRAL ILLINOIS. .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS TONIGHT AS A COLD FRONT DROPS SOUTH INTO THE AREA. NONE OF THE STORMS ARE EXPECTED TO BECOME SEVERE... ALTHOUGH GUSTY WINDS MAY DEVELOP IN THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THUNDERSTORM CHANCES WILL LINGER ON SUNDAY AS THE COLD FRONT SLOWLY PROGRESSES TOWARD SOUTHERN IL. ADDITIONAL CHANCES OF STORMS WILL COME NEXT WEDNESDAY AND WEDNESDAY NIGHT AS THE NEXT COLD FRONT MOVES ACROSS THE AREA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT. ILZ066>068-071>073-081100- CLAY-CRAWFORD-EFFINGHAM-JASPER-LAWRENCE-RICHLAND- 311 PM CDT SAT SEP 7 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ILLINOIS. .DAY ONE...TONIGHT THERE IS A CHANCE OF THUNDERSTORMS LATER TONIGHT AS A COLD FRONT DROPS SOUTH INTO THE AREA. NONE OF THE STORMS ARE EXPECTED TO BECOME SEVERE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THUNDERSTORM CHANCES WILL LINGER ON SUNDAY AS THE COLD FRONT SLOWLY PROGRESSES TOWARD SOUTHERN IL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT. HJS
In the hours before
Special weather statement, Sep 8, 1:38 AM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
138 AM CDT SUN SEP 8 2013
ILZ027-036-080745-
FULTON-KNOX-
138 AM CDT SUN SEP 8 2013
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN FULTON AND SOUTHERN KNOX
COUNTIES UNTIL 245 AM CDT...
AT 136 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR KNOXVILLE...OR 7 MILES SOUTHEAST OF
GALESBURG...MOVING SOUTHEAST AT 15 MPH.
PENNY SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THIS
STORM.
LOCATIONS IMPACTED INCLUDE...
GILSON...
MAQUON...
LONDON MILLS...
FAIRVIEW...
FARMINGTON...
YATES CITY...
OTHER LOCATIONS AFFECTED INCLUDE...EAST GALESBURG...DELONG AND MIDDLE
GROVE.
PEOPLE NEAR THESE LOCATIONS SHOULD MONITOR THE WEATHER SITUATION
CLOSELY. LISTEN FOR POSSIBLE WARNINGS...AND BE PREPARED TO TAKE
APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.
LAT...LON 4092 8999 4073 8999 4057 8999 4067 9027
4082 9044 4106 9044
TIME...MOT...LOC 0638Z 318DEG 11KT 4086 9032
SHIMONThe office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 1:47 AM CDT | Severe Thunderstorm Warning | ILX | Knox | 43 min |
| Sep 8, 2:12 AM CDT | Flash Flood Warning | ILX | Knox | 6 hr |
| Sep 8, 3:18 AM CDT | Special Weather Statement | ILX | Fulton | 57 min |
| Sep 8, 3:21 AM CDT | Severe Thunderstorm Warning | ILX | Fulton | 54 min |
| Sep 8, 4:05 AM CDT | Severe Thunderstorm Warning | ILX | Fulton | 40 min |
| Sep 8, 4:10 AM CDT | Flash Flood Warning | ILX | Fulton | 6 hr |
Nearby
Special Weather Statements in Illinois, 2013Every special weather statement in 2013
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.